Method for winding



Feb. 28, 1950 2 Sheets-Sheet 1 Filed Oct. 15, 1945 INVENTOR PA 11174 71. fiQ'rJ/V BY W 6. ATTORNEY a a Q Q m\ a um .11 H l t] H mi km 3 Q .n v. \N \@N m \N Feb. '28, 1950 P. R. HIRSH METHOD FOR WINDING 2 Sheets-Sheet 2 Illllllll l lllltl III'III I i Filed Oct. 15, 1945 WW mm INVENTOR P2111174 J1. fl/m/V Woo? 2m FITTORNEY opposite sides of the core.

F'atenteci Feb. 28, 1950 UNITED STATES OEFFlCIE 2 ,49s,ss1

-METHOD' FOR 'WINDING 'Philip ,RaHirshMontclair, N. J..,.as signor to Look Joint vPipe .Company, East Orange, N.' J., a corvporation,.,oi-' New Jersey Application October-15, 19.46,,Serial;No.;622,343

being wrapped about the core is tensioned through a sheave from which the wire extends to In the United States Patent No. 2,348,765, a core-winding process is described wherein the end of a wire is attached'to one end of the core and the wire is helicallywound around the core to form a temporary wrapping.

'For applying a permanent wrappingthe wire at the terminus of the temporary wrapping is passed over a sheave and is then brought back-to the core and attached thereto adjacent the last wrap of the temporary wrapping. Tension is applied to the two leads of Wire extending to the core and the sheave, and the core is then rotated in such direction as to unwind the temporary wrapping as the sheave is translatedtowards the initialend of the temporary wrapping. 'As the core is rotated and the sheave is translated the wire leaving the temporary wrapping isreapplied to'the core as a permanent wrapping under .tension, When the sheave has returned to its initial position, the end of the permanent wrapping is secured to the core and the wire is out beyondthe place of securing. The described process has the advantage of providing balanced couples upon the core as the result of equal and opposite forces transmitted through the two 'tensionedleads of wire extending between'the sheave and the core so that the power required to rotate the core'in applying the permanent wrapping is only slightly more than would be necessary to rotate the core idly. The process is also suitable for applying a highly tensioned wrapping having a known and constant tension throughout the length of the wrapping. The present invention hasas an object the retention of these advantages by providing a process whereby only one pass of atension-applying sheave lengthwise of the core is employed for applying a tensioned wrapping.

A further object of the present invention is to enable concluding a. tensioned wrapping as close to the ends of a core as desired with only one pass of a tensioning devicelengthwiseof the core.

Other objects and advantages of the present invention will be hereinafter set forth in the accompanying specification and claims, and illus- .trated in the 'drawingsin which sequential stages in the process of wrapping a wire about a core .are shown.

Eigure 1 illustrates the right end of a coreto which a cinch winding or snubbing has been applied;

Fig. 2 illustrates the application of :a Weighted ,sheave toaloopof wire between :the anchored iendlof ythe wireiand the cinchpwindin Fig. 3 illustrates an intermediate stage Qf'lthe :wrappingof the core .asit progresses from the right endtothe left end. of the core; 7

Fig. 4.illustrates .thesstage at which the wound wrapping has reached the leftrend ofthecore and has'been fastened to thecore;

:Fig. 5 is a section'at line-5'5 of-Fig. :2;

Eig 6 is a longitudinal section through a portionoftheleftend of a core and an attached mandrel or other device which provides a surface incontinuation of the surface of thecore.

or other iform of device capable of providing a surface continuing beyond the end of the core, as shownin Figs. 4 and '6. The combined core and mandrel is mounted as a unit in the machine by which it is supported ontwo pairs of rollers I2 and i3, one at each end of the unit. A runner ring M, which. is temporarily fastenedto'one end of the core, rests upon one. pair of rollers I2, and the other. end of the unit is supported bythe other pair of rollers l3, which engage a flange 15 of themandrel.

The winding machine is provided with a travelling carriage (not shown) Whichmoves alongside of the core and carries .aguide It for the feed portion of the wire which passes to the core. The wire passes freely through the guide and is laid onto the core in a helical course l1, Fig. 1. sheave J8, by which the wire to be permanently applied ,is tensioned, travels lengthwise of the core at'the rate. of travel of guide 16 and may be guided by the travellingoarriage or leftto be controlled by the pitch of the wire wrappingll previously wound onto the core. As shown in Fig.

2, the sheave is engaged by a loop IQ of the wire between turns l7 and the end of the wire which is permanently anchored to the core at 20. The wire of the permanent winding starts at 20, Fig. 2, and tensioned by the application of force to the sheave. In the drawings I have illustrated the sheave as being weighted and suspended from the loop |9,Figs. 2, 3, 4 and 5, but other forceapplying means, such as described in the aforesaid patent, may be employed for applying the desired tension.

The core it, which may be a pipe o'r-solid body in any form, is shown as a steel sleeve 2| with a bell ring 22 fastened thereto. The mandrel II may be made up of a plurality of plain rings I5, 23, 24, 25 and 26, as illustrated in Fig. 6, which are joined together to constitute a single device detachably connected to the core. The mandrel preferably is designed frictionally to engage with the interior of the core. In assembling the mandrel onto the end of the core, it is then necessary only that the mandrel be shoved home into snug fitting relationship with the bell ring.' 'The assembled core and mandrel are mounted as a unit in the winding machine.

After the core and its attached mandrel are mounted in the machine, the end of wire is temporarily attached toone end of the core, as at 21, Fig. 1, and the coreis rotated suificiently to apply a few turns I! of the wire about the core. These turns of wire are applied without tension or with only such tension as is afforded by slight drag on the reel from which the wire is drawn or on the wire itself.

The end of the wire which is temporarily attached to the core at 21 is then detached therefrom and unwound from the core sufficiently to form a loop I9 for engaging the tensioning sheave l8. This end of the wire is looped about the sheave and fastened to the core, as at 20, Fig. 2. Any kind of an anchoring device whichwill serve to permanently secure the end of the wire to the core may be used. The wire in the loop of wire engaged by the sheave is subjected to tensile stress by the application of a predetermined loade28 on the sheave. The turns of wire which are located between guide I6 and sheave l8 provide sufiicient snubbing effect to prevent slippage of the wire under the tension exerted by the applied load. l

The wire winding machine is then operated, and starting from the. anchored end 20, the wire is helically wrapped about the core as a permanent wrapping 29 as guide !6 is moved toward the other end of the core and the core is rotated clockwise as viewed in Fig. 5. The wire passing through guide It winds into and unwinds from the cinch turns ll, passes over sheave l8, and enters the permanent winding 29.

An intermediate position of the tensioning sheave and guide is illustrated in Fig. 3. At this position the winding being permanently applied is to the right of the sheave l8, and the cinch winding is to the left of the sheave. As the operation of the machine continues, the permanent winding is extended towards the left end of the core with the cinch turns preceding'it.

When the tensioning sheave comes to a selected position opposite the end of the core, the operation of the machine is discontinued. In this position, the cinch turns have advanced over the mandrel as illustrated in Fig. 4. The end of the permanent winding may then be anchored to the core as closeto the end of the core as is desired.

For anchoring purposes, any suitable anchoring device may be used. If a sleeve of the type illustrated in United States Patent No. 2,375,921 is preferred, it is necessary to initially thread the wire through the sleeve at the beginning of the wire-winding operation. Such a sleeve 30 is illustrated in Figs. 1, Z and 3 as being slidably mounted upon the wire and held in a reserve position by guide 16. The sleeve is held by this guide as the wire loosely passes therethrough and until the wire winding operation nears completion. It is then released from the guide member and secured to the wire. Thelatter operation occurs at such a place as to locate the sleeve against the core where it is desired it be fastened to the core as shown in Fig. 4. An experienced operator soon determines at what stage of the winding operation it is necessary to stop the machine and fasten the sleeve to the wire in order to locate it in the position desired against the core. The sleeve is then welded to or otherwise attached to the core.

After the wire is thus securely anchored and after. the weight has been relieved from the sheave, the wire is out beyond the anchor, that is to say, between the anchor 38 and the cinch turns IT, as at 3|, Fig. 4. The process just described completes the wire winding of the core, and it remains only to unwind the cinch turns and dismount the core and attached mandrel. The mandrel is then removedfrom the core.

If preferred, instead of using a detachable mandrel as an extension of the core for receiving the cinch turns, the cinch turns may be made to run upon the surface of a chuck or other rotating. part of the winding machine which closely fits with the core and provides a surface in continuation of the surface of the core being wrapped.

What is claimed is:

1. In a method for wrapping a line about a core, the steps comprising applying a mandrel to one end of a core, attaching the end of a line to the other end of the core, snubbing the line on the core adjacent the attached end by applying turns of line about the core in sufficient number to prevent slippage of the line when tensioned and leaving a loop of line between the snubbing and the attached end, tensioning the line between the snubbing and attached end by applying force to the loop of 1 line, winding a permanent winding onto the core by rotating the core while translating the loop of line longitudinally of the core and continuing the application of the permanent winding until the snubbing has passed onto the mandrel, securing the permanent winding to the core, relieving the applied force, and severing the snubbing from' the last secured end of the line. 2. In a method for wrapping a line around a core, the steps comprising snubbing a length of line about a core, attaching the end of the line to the core with a loop between the snubbing and the attached end, applying force to the loop in the line, applying a permanent winding to the core starting from the point of attachment by rotating the core and translating the formed loopa-nd snubbing longitudinally of the core, continuing the application of the permanent winding until it has reached the other end of the core and the snubbing has passed beyond the core and onto a receiving surface, attaching the wound line to the core, releasing the force on the loop of line, and severing the snubbing from the permanent winding remaining on the core.

3. In a method for wrapping a line about a core, the steps comprising attaching to one end of a core a mandrel having a surface in continuation of the core, feeding a line to provide cinch turns about the core in sufiicient number to prevent slippage of the line when the line is subsequently stressed, securing the free end of the line to the core, stressing the line between said cinch turns and the portion of the line which is secured to the core, applying a line about the core by relatively rotating and translating the core and the cinch turns and thereby winding and unwinding the cinch turns and winding the line therefrom and into a permanent Wrapping about the core, extending the permanent wrapping in such fashion and until the cinch turns have passed onto the surface of the mandrel attached to the core, and then securing the permanent wrapping to the core.

4. In a method for Wrapping a line about a core, the steps comprising applying cinch turns of line about a core in sufiicient number to prevent slippage of the line when subsequently stressed, securing the free end of the line to the core, stressing the line between the secured end and the cinch turns, unwinding the cinch turns and winding the line therefrom into a permanent wrapping of tensioned line about the core as line is run into the cinch turns and the length of the permanent wrapping is increased, continuing the winding of the permanent wrapping as the cinch turns reach and extend onto a receiving surface beyond the end of the core, and securing to the core a portion of the line intermediate the permanent wrapping and the cinch turns.

PHILIP R. HIRSH.

REFERENCES CITED The following references are of record in the 

